89 lines
5.8 KiB
HTML
89 lines
5.8 KiB
HTML
|
<?xml version="1.0" encoding="UTF-8"?>
|
||
|
|
<!DOCTYPE html
|
||
|
|
PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
|
||
|
|
<html lang="en-us" xml:lang="en-us">
|
||
|
|
<head>
|
||
|
|
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
|
||
|
|
<meta name="security" content="public" />
|
||
|
|
<meta name="Robots" content="index,follow" />
|
||
|
|
<meta http-equiv="PICS-Label" content='(PICS-1.1 "http://www.icra.org/ratingsv02.html" l gen true r (cz 1 lz 1 nz 1 oz 1 vz 1) "http://www.rsac.org/ratingsv01.html" l gen true r (n 0 s 0 v 0 l 0) "http://www.classify.org/safesurf/" l gen true r (SS~~000 1))' />
|
||
|
|
<meta name="DC.Type" content="reference" />
|
||
|
|
<meta name="DC.Title" content="Scenario: LAN connected devices only with take over enabled" />
|
||
|
|
<meta name="abstract" content="This is a description of what happens during an IPL when console take over is enabled and more than one LAN-connected device is available." />
|
||
|
|
<meta name="description" content="This is a description of what happens during an IPL when console take over is enabled and more than one LAN-connected device is available." />
|
||
|
|
<meta name="DC.Relation" scheme="URI" content="rzajrconsolescenarios.htm" />
|
||
|
|
<meta name="copyright" content="(C) Copyright IBM Corporation 2000, 2006" />
|
||
|
|
<meta name="DC.Rights.Owner" content="(C) Copyright IBM Corporation 2000, 2006" />
|
||
|
|
<meta name="DC.Format" content="XHTML" />
|
||
|
|
<meta name="DC.Identifier" content="scenariotakeover1" />
|
||
|
|
<meta name="DC.Language" content="en-us" />
|
||
|
|
<!-- All rights reserved. Licensed Materials Property of IBM -->
|
||
|
|
<!-- US Government Users Restricted Rights -->
|
||
|
|
<!-- Use, duplication or disclosure restricted by -->
|
||
|
|
<!-- GSA ADP Schedule Contract with IBM Corp. -->
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ibmdita.css" />
|
||
|
|
<link rel="stylesheet" type="text/css" href="./ic.css" />
|
||
|
|
<title>Scenario: LAN connected devices only with take over enabled</title>
|
||
|
|
</head>
|
||
|
|
<body id="scenariotakeover1"><a name="scenariotakeover1"><!-- --></a>
|
||
|
|
<!-- Java sync-link --><script language="Javascript" src="../rzahg/synch.js" type="text/javascript"></script>
|
||
|
|
<h1 class="topictitle1">Scenario: LAN connected devices only with take over enabled</h1>
|
||
|
|
<div><p>This is a description of what happens during an IPL when console
|
||
|
|
take over is enabled and more than one LAN-connected device is available.</p>
|
||
|
|
<div class="section"><p>The LAN devices will be called LAN1, LAN2, and LAN3. The IPL
|
||
|
|
is being performed in unattended (Normal) mode.</p>
|
||
|
|
<p>At the point in an IPL
|
||
|
|
when the console device is being determined, it is more or less a race condition
|
||
|
|
if more than one device is connecting at a time. The first device to connect,
|
||
|
|
of the type specified by the console mode setting (LAN in our example), becomes
|
||
|
|
the console and will be presented with the usual console screens.</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>For our example let's say LAN1 is the first device connected.
|
||
|
|
During the IPL this device will show the IPL status changes just like any
|
||
|
|
other console and eventually the <span class="keyword">i5/OS™</span> sign
|
||
|
|
on window. LAN2 and LAN3 will show a special DST signon screen with a new
|
||
|
|
line of data stating <tt class="sysout">ATTENTION: This device can become the
|
||
|
|
console</tt>. The rest of the window will be the same as any other
|
||
|
|
DST signon window. At LAN2 a user with the user privilege of take over console
|
||
|
|
signs on. This user will now be presented the same <tt class="sysout">Console
|
||
|
|
Information Status</tt> screen and the take over the console
|
||
|
|
field will show a <tt class="sysout">YES</tt> indicating that take over
|
||
|
|
is possible. At LAN3 a user without the take over console privilege signs
|
||
|
|
on. The take over the console field will show as <tt class="sysout">NO</tt> since
|
||
|
|
the user does not have the correct authority for take over.</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>At this point only one device has met all the conditions for a
|
||
|
|
console take over. At the bottom of the screen is F10=Take over console connection.
|
||
|
|
Pressing F10 will present the user with the Take over Console Connection
|
||
|
|
From Another User screen. This is a confirmation screen that gives the user
|
||
|
|
a last chance to cancel the take over. Selecting 1 and then pressing Enter
|
||
|
|
at this point will cause the take over to occur. Almost immediately, LAN1
|
||
|
|
will get the special DST signon screen and LAN2, the device that initiated
|
||
|
|
the take over, will have the exact same screen LAN1 had when the transfer
|
||
|
|
took place. The job, if something was running, doesn't even know this action
|
||
|
|
took place. In fact, the original console could have been installing Licensed
|
||
|
|
Internal Code or <span class="keyword">i5/OS</span> or
|
||
|
|
even running a complete system save in restricted state and the server would
|
||
|
|
not know it. You could even disconnect the console connection and come back
|
||
|
|
later, reconnect, and you will get the current job's screen data and the job
|
||
|
|
would never miss a beat. If a large amount of screen data was sent by the
|
||
|
|
job and could not be delivered, the data will be stored until later. When
|
||
|
|
a console reconnects, by an authorized user (has the take over console privilege)
|
||
|
|
from an eligible device, the user may see fast screen refreshes until all
|
||
|
|
the stored data has been delivered. Actually, doing a disconnect and a reconnect
|
||
|
|
is considered a recovery (not a take over).</p>
|
||
|
|
</div>
|
||
|
|
<div class="section"><p>The data present at LAN3 will not change after the take over.
|
||
|
|
Currently, there is no method to automatically refresh the data. However,
|
||
|
|
if the user at LAN3 pressed Enter, a manual refresh of all fields except the
|
||
|
|
Take over the console field would occur. The user would have to exit this
|
||
|
|
screen and sign on again to see the change to that field.</p>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
<div>
|
||
|
|
<div class="familylinks">
|
||
|
|
<div class="parentlink"><strong>Parent topic:</strong> <a href="rzajrconsolescenarios.htm" title="The following scenarios will help you understand the take over and recovery options.">Scenarios</a></div>
|
||
|
|
</div>
|
||
|
|
</div>
|
||
|
|
</body>
|
||
|
|
</html>
|